Tension device for yarn-winding machines



H. A. DAVIS TENSION DEVICE FOR YARN WINDING MACHINES Feb; 22, 1927. 18,699

Filed April 19, 1926- 2 Sheets-Sheet 1 Fig.1.

lnvenTon.

Harry A. Davis /wa WLVW AITys.

Feb. 22, 1927; I 1,618,699

H. A. DAVIS TENSION DEVICE FOR YARN WINDING MACHINES Filed April 19, 1926 2 Sheets$helet 2 9 lnvenTor.

Harry A. Davis b /mz MyM I ATTys.

Patented Feb. 22, 1927.

UNITED stares;

PATENT QEFFICE.

HARRY A. DAVIS, OF HOPEDALE, MASSACHUSETTS, ASSEGNOR TO DRAPEE CORJPOEA- TION, OF HOPEDALE, MASSACHUSETTS, A GO'BEQRATION OF MAINE.

TENSION DEVICE son YARN-WINDING MAcnnvEsf Appl ca o fi e prfl 6-. S i No- 102, 75..

This invention relates to means. for controlling the tension on the yarn as it is drawn off from a yarn carrier upon which the yarn is wound with a weft wind and wound on to areceiver. More particularly the invent-ion relates to thus controlling the tension on the yarn in a spooler Where the yarn is wound'ofi from aweft wound filling carrier or bobbin on to a spool. i

In such machines it is very important that the yarn shall be wound on to the receiver or spool under as uniform tension as possible and free from kinks. If the yarn balloons as it is drawn off from the yarn carrier and if the tension on the yarn is irregular, kinks in the yarn vare y ap to orm a d e retained in the yarn as it is wound on the receiver Or spool. Such a' kink then passes into the warp or filling and affects the weavinnoperation, such as producing an imperfection in the cloth or; causing the operation of the warp stop nlOtion.

The yarn carrier is mounted in a suitable standard secured on; the frame of the machine with a yarn guide on the standard beyond and in line with the axis of the yarn carrier to direct the yarn to the traverse rod which moves vertically to, traverse the yarn over the receiver or spool. The run of 3 71 from the ar ca rier t this ya n gui and the run of yarn from the yarn guide to the receiver or spool must both be under control so that the'tension of the yarn in each of these runs shall be even and ballooning of the yarn prevented with its consequent formation of kinks.

The object of the invention is to control the tension on the yarn in both of these and thus secure a satisfactory wind on, the receiver or spool.

The object of the invention is, further to provide a tension mechanism'in which one or more cords extend lonaitudinally of the yarn carrier in contact with the. yarn mass and in which these cords are under tension whichmaintains them in contact with the yarn mass and thus prevents ballooning and secures the requisite tension in the yarn as it is drawn off from the yarn carrier and passes to the yarn guide.

The object of the invention is further to secure the required tension in the aforesaid d or rds y m ans o the longitudinal elasticity of the cord or co f lS.

invention embodied therein.

' The object of the invention is further to provide supporting means for the cord or cords employed in the preferred form of the invention by means of which a ready dofling of the yarn carrier from its support may be ec red.

These and other objects and features of the invention will appear more fully in the accompanying description and drawings and wi e p rticular y defi e n the claims.

The drawings illustrate so much of an ordinary spooler as is necessary to disclose a preferred application and embodiment of the present nvention.

As the general constructionand operation of a windingmachine and in particular of a spooler is well known and familiar to those skilled in the art and as the construct-ion of the invention employed is repeated in each windingunit of the machine; itis unnecessary here to illustrate and describe anything more than those features. directly concerned with the present invention and also but a single unit of the machine.

In the drawings:

Fig. 1 is a view in side elevation and partially in vertical cross section of a portion of a spooler with the preferred form of the Fig. 2 is a side elevation of a tension device applied to the traverse rod. p

Fig. 3 is a front elevation of the construction shown in Fig. 2. i p

Fig. 4; is a front elevation of the standard and construction embodied therein shownin Fig. 1. i

Fig. 5. is .a view similar to the lower portion of Fig. 4 illustrating a modification.

Fig. 6. is a rear elevation of the yarn guide and tension mechanism looking to ward the left in line with the axis of Fig. 7.

Fig. 7 is a top plan view normal tothe axis of the standard and mechanism connected therewith shown in Fig. 1.

Fig. 8 is a front elevation with the yarn guide and arts supported thereby shown in Figs. 1, 4 and 7 removed andlooking toward the right of Fig. 7 in line with the axis.

' 9 is a view similar to Fig. 8 with the yarn carrier removed and with the arm swung to doffing position. i

A portion of the frame 1 of a spooler is shown with the transverse beam 2 0 which is mounted the spindles for the yarn reeeivers or spools 3. Each spool is driven in the usual manner hy a whirl The traverse rod 5 is reciprocated up and down hy the usual mechanism to traverse the yarn longitudinally ot' the spool as it; is wound there on. A rod (3 extends transi 'erscly of the frame and to this rod is secured separate standards, one for each spool.

In the present construction, the standard 7 extends forwardly and u iwardly and is secured to the rod (5 hy a hi'lurcated portion locked to thertul l a set screw 8. At its lower end the standard '1' is provided with a laterally projecting hose ll on which is mounted a suitable supportherein shown as a stud 10 for the yarn carrier or hohhin 11. The yarn is wound on thisrarrier with the usual wett or filling: wind so that it is unwound or drawn oil from the yarn carrier by pulling it lraio itudiiuilly oil the tip 1.... \Vith this type of wind the yarn is laid in conical layers on the carrier and consequently, it um'esta'ained. unwiuds at a *aryiiur speed and with varying tension. Y

A yarn guide is mounted on the standart beyond and in line with the tip of the yarn rt t titl

carrier. In the construction illustrated, this yarnguide is shown as a forked projection 13 extending laterally of the stainilard 7 in which is mounted at the base of the l'orhed portion avitreous roll or st d 1% over which the yarn is guided. Preterahly also a second vitreous roll or stud u. is mounted in the yarn guide and beyond the roller stud let to direct the yarn back toward the traverse rod. y I

A shaft or rod 16 is journalled at its lower end in the base of the standard 7 and at its upper end in a lateral projection Won the standard. is provided witlra lung 18 having a shoulder 19. The base 20 ot the yarn guide is ri a'id l r secured to the end of the rod it and is provided on its lower taco with a hut 2i havint; a shoulder 22 cooperating with the shoulder 1 t). \Vhen the shoulders it! and .32 a re in contact the yarn guide is in its normal position. The yarn guide may. thmvevcr. he swung to the right, viewing Fig. 1-, turning: with the rod to and he thus carried out of line with the axis of the yarn carrier to permit the dotliut! ot' the yarn carrier from its support.

An arm 23 is serured to the rod to and is adjustahle rotarily and loiuritlulinaliy thereof hy means of the set screw it in the huh :25 ot' the arm mounted on the rod. 'l'hia arm 23 curved to extend well around and riroumtereut'ially of and Iawf'oud the yarn carrier at a position ahovoor hoyond the tip of the yarn carrier and consequently he tween this tip and the yarn guide 13.

The required tension on the yarn mass 26 of the yarn carrier is seeuredin this invention by one or more cords. In a simple and yarn carrier and is end 32 in the end of the arm 23.

This )ro'ection at its no oer 'l'acepreferred arrangement illustrated two such cords are employed hat the numher may he varied as required. in the construction illustrated, one cord 27 extends from a point 28 in the base 9 up to a point 29 on the projection 17. This cord extends longitudinally of the yarn carrie and. preferably hell (sally and the direction. of its path may he adjusted, in the construction shown, hy so curing the upper end in one ot the several holes 29. The second cord 30 illustrated is pre't'erahly mounted at a point 31 in the hase sul'istantially diametrically opposite to the point 28 and extends longitudilutlly ot the mounted at the upper This cord also therefore preterahly extends helirally Oil the yarn carrier and in a. direction opposite to that oi the cord 27.

Suitahle means are provided for producing tension in the. cord or cords employed so as to uiaiutain them when in operative posi tion in contact with the yarn mass. This tension is preferably produced as in the construction shown in Figs. 1, ll, 7, 8 and 9 by making the cords themselves longitudi nally elastic and mounting them so that they are held taut and sung against: the yarn mass throughout the unwinding operation. But other means may be employed. For example, as shown in Fig. 5. the cords are shown of a non-elastic character extending through holes in the hose 9 and provided at their lower ends with weights 33. 'lhese weights, the size and amount of which may he varied as desired, act to produce the required tension in the cords.

hen it is desired to doll the yarn carrier, and by thatphrase is meant either placing a fresh yarn carrier on the said support or removing the unwound yarn carrier tlieretroin, theyarn guide 13 is swung to the right, viewing Fig. 4-, thus I'Ot'tltdngtltt) rod 16 and wringing with it the arm 23.

This carries the upper end of the cord, 30 ciroumlerentially or away 'l'rom the yarn oarrie and uuwinds the cord 30 and hits it away from the yarn mass. Usually also, where two cords are. employed, the other cord 27 is held up against the yarn mass hy engagement: with the arm .23 and hy the cord iltl overlapping the cord 2'1 so that when the shaft 16 is thus rotatcrh this cord 27 is relieved so as to move away somewhat l'rom the yarn mass. Thus, the yarn gjlidt and the arm 23 heiuu' out ot the way and the cords 'lrced, the yarn rarrier may he readily removed from or placed on the supporting stud. r r lliistorlsion mechanism is found very etlcctive in equalizing the tension on the yarn as itis drawn oil the yarn carrier over the yarn guide, the cord or cords lying in contact wlth the yarn massand givl-ng a yielding frictional action on the yarn which lit) loo

.llt)

liit) produces the required tension. The adjust ments provided at the upper ends of the cordsand the ability to vary the yield or stretch of the cords, when of the elastic character, or to vary the weights when of the non-elastic character, enable the tension to be controlled very accurately. As a result, there is practically no ballooning of the yarn on the run from the yarn carrier to the yarn guide and no kinks are formed.

A suitable tension device is located between the yarn guide and the receiver or spool upon which the yarn is wound so as to control the tension on the yarn in this run. This tension device may be mounted either from the standard or from the traverse rod and a suitable device is shown for both positions.

In Figs. 1, at, and 7 the tension device is shown as mounted from the standard and conveniently on the yarn guide. In the construction illustrated, a metal box-like structureiA open at the top and bottom is supported directly over the guiding stud or roll 14. This box is supported by a depending portion 35 of one side wall connected by screws 86 to the yarn guide and conveniently serving to hold in place the roll or stud 14. Cylindrical rolls of-adjustable weight are guided in the box and rest upon the'yarn as it passes over the roll or stud 14. As shown, these cylindrical weights 37 are concentric metal cylinders so that one may be employed or a plurality nested to give the required pressure and consequent tension on the yarn. A projection 88 extends laterally from the yarn guide and serves asa threading guide to direct the yarn beneath the rolls 37 in threading up the machine.

A similar tension device is shown in Figs. 2 and 8 for mounting on the traverse rod 5. In this case the box 89 is supported from a bracket 40 bolted to the b acket 41 carrying the usual clearer 42, the two brackets clamping the traverse rod 5. A pointed polished steel or vitreous cylindrical stud 43' projects laterally from the bracket 40 directly beneath the box 39 and the weighted rolls 37 rest on the yarn as it passes over this stud. A laterally projecting guide arm 44 serves to direct the yarn in threading between the roll 37 and the stud 42.

Thus by the use of either of these tension devices the tension on the run of yarn extending from the yarn guide 13 to the yarn receiver or spool is cfiiciently cont-rolled.

There is thus presented a simple, effective and eiticient means for controlling the tension on the yarn as it passes from the yarn carrier to the yarn receiver and one which may be readily attached to existing spoolers. The mechanism is particularly useful in connection with hard twisted yarn which under.

ordinary conditions is very likely to kink, but it is applicable for all purposes,

swing transversely of the tip of the yarn carrier, a cordextending from the base of the standard helically of the yarn carrier to a point on the standard beyond the tip of the yarn carrier, a second cord extendlng from another point on the base in the opposite direction helically of the yarn carrier to a point on the arm, means for producing tension in said cords to maintain them in contact with the yarn mass,whereby the yarn is maintained under the required tension and prevented from ballooning as it is drawn off the yarn carrier in the winding operation and whereby, when the arm is swung aside, the second cord is unwound to permit the ready dotting of the yarn carrier.

2. A tension mechanism for yarn winding machines comprising a standard, a support on the standard for a weft wound yarn carrier, an arm mounted on the standard to swing transversely of the tip of the yarn carrier, a pair of cords extending from substantially diametrically opposite points of the base, the one to a point on the standard beyond the tip of the yarn carrier and the other to a point on the arm, means for producing tension in said cords to maintain them in contact with the yarn mass, whereby the yarn is maintained under the required tension and prevented from ballooning as it is drawn ofl the yarn carrier in the wind-- ing operation and whereby, when the arm is swung aside, the second cord is unwound to permit the ready dolfing of the yarn carrier.

3. A tension mechanism for yarn winding machines comprising the construction defined in claim 1, together with means for adjusting the said arm rotarily of its axis thereby to vary the position of the end of the cord connected to the arm circumferentially of the yarn carrier.

4-. A tension mechanism for yarn winding machines comprising a standard, asupport on the standard for a weft wound yarn carrier, a cord mounted in the standard and extending longitudinally of the yarn carrier, means for producing tension in said cord to maintain it in contact with the yarn mass, and means for adjusting the point at which one end of the said cord is mounted in the standard circumferentially of the yarn carrier thereby to vary its line of contact with the yarn mass, whereby the yarn is maintained under the required tension and prevent-ed from ballooning as it is drawn oi the yarn carrier in the winding operation.

5. A tension mechanism iienym'n wini ling unurhines cmnprising a si'umhmi. u euppel'i'; en the Siflndilil'd f0 Weft: wnumi yarn 0mi-iel', :1 "plurality of cords mounted in the HiHlIitLlTi and extending in. (hfler-ent paths iungiiuiliimlly of the yzu n carrier, means for producing Lennon in said words to mainuin them in ceni'net' with the yarn mass, and means for adjusting; the points at which one end of 11011 of the said cords is mounted in (he Siillhiill'l] (3iieumfei'elitiziily of the yarn carrier therehy to vary the lines of vontact. of mid (30111:; with the yarn mass, whereby the yarn is maintained under the requirmi (ens'on and prevented from hallooning as it (h'nwn 011' the yarn carrier in the winding operation.

In testimony whereof, I have signed my name to this specification.

HARRY A. DAVIS. 

